ERROR_SECUREBOOT_NOT_BASE_POLICY 0x80071152

Error code 4434 · HRESULT 0x80071152

WINDOWS

Supplemental Secure Boot policy file can not be loaded as a base Secure Boot policy.

Windows troubleshooting diagram: Device Manager warning and a system file scan
Windows errors: check drivers, system files and Event Viewer, in that order.

What it means

ERROR_SECUREBOOT_NOT_BASE_POLICY is a Windows error code (system error 4434, returned as HRESULT 0x80071152) reported by Windows. Its official message is: “Supplemental Secure Boot policy file can not be loaded as a base Secure Boot policy.”

How to fix ERROR_SECUREBOOT_NOT_BASE_POLICY

  1. Reboot once — many one-off system codes disappear with a clean restart
  2. Repair system files: 'sfc /scannow' then 'DISM /Online /Cleanup-Image /RestoreHealth'
  3. Find the source in Event Viewer → System: filter for this exact code and open its provider link

Related errors

ERROR_SECUREBOOT_NOT_SUPPLEMENTAL_POLICYERROR_SECUREBOOT_NOT_ENABLEDERROR_SECUREBOOT_REQUIRED_POLICY_FILE_MISSINGERROR_SECUREBOOT_POLICY_UPGRADE_MISMATCHERROR_SECUREBOOT_POLICY_ROLLBACK_DETECTEDERROR_SECUREBOOT_PLATFORM_ID_MISMATCHERROR_SECUREBOOT_POLICY_MISSING_ANTIROLLBACKVERSION

Source: Microsoft WinError.h

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